Paul Sereno, a palaeontologist at the University of Chicago, with his Saharan discoveries – SuperCroc, BoarCroc (upper right), PancakeCroc (lower right), RatCroc, DogCroc and DuckCroc. The fossil crocs were unearthed in a series of expeditions to the Sahara beginning in 2000, supported by the National Geographic Society

A flesh model of the head of RatCroc and its fossil lower jaw. RatCroc used its pair of buckteeth to dig for plant roots and grubs. Other fossil bones, not pictured, helped flesh out RatCroc’s features